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. Author manuscript; available in PMC: 2026 Apr 5.
Published in final edited form as: J Chromatogr A. 2026 Jan 21;1769:466721. doi: 10.1016/j.chroma.2026.466721

Fig. 5.

Fig. 5.

Fig. 5.

Fig. 5.

Fig. 5.

Representative MRM chromatograms of nucleosides: (A) double blank negative control; (B) blank spiked with internal standards; (C–E) negative control spiked with 2-dC, 5-mdC, and 5-hmdC with their internal standards; (F–H) enzymatically digested mouse liver DNA showing endogenous 2-dC, 5-mdC, and 5-hmdC with internal standards.